How to check the contents of Control file, Log file & Parameter file

Can anybody help me how i can check the contents of Control file, Log file & Parameter file.
Arif

OK ...
Parameter file:
It will normally be in the $ORACLE_HOME/dbs directopry. It could be aan init{sid}.ora or a spfile{sid}.ora ... do not edit an SPFILE as yu could corrupt it.
http://download-east.oracle.com/docs/cd/B19306_01/server.102/b14231/create.htm#sthref434
If it's an init{sid}.ora, use any editor to see the actual content.
If it's a spfile{sid}.ora, use one of V$PARAMETER, V$PARAMETER2, V$SYSTEM_PARAMETER, V$SYSTEM_PARAMETER2 as aappropriate (read the Reference manual to get an idea about when each is appropriate)
Control File:
You should not edit a control file. It consists of many areas, as described here http://download-east.oracle.com/docs/cd/B19306_01/server.102/b14220/physical.htm#i10135 and each are is interrogated by V$views as given in the reference manual. The following V$views all deal with some aspect of the control file or provide info about the control files or the contents of control files:
V$ARCHIVE_DEST
V$ARCHIVED_LOG
V$BACKUP_ARCHIVELOG_DETAILS
V$BACKUP_CONTROLFILE_DETAILS
V$BACKUP_CONTROLFILE_SUMMARY
V$BACKUP_COPY_DETAILS
V$BACKUP_COPY_SUMMARY
V$BACKUP_CORRUPTION
V$BACKUP_DATAFILE
V$BACKUP_DATAFILE_DETAILS
V$BACKUP_FILES
V$BACKUP_PIECE
V$BACKUP_REDOLOG
V$BACKUP_SET
V$BACKUP_SET_DETAILS
V$BACKUP_SPFILE
V$CONTROLFILE
V$CONTROLFILE_RECORD_SECTION
V$COPY_CORRUPTION
V$DATABASE
V$DATABASE_INCARNATION
V$DATAFILE
V$DATAFILE_COPY
V$DATAFILE_HEADER
V$DELETED_OBJECT
V$LOCK
V$LOG
V$LOG_HISTORY
V$LOGHIST
V$OBSOLETE_BACKUP_FILES
V$OFFLINE_RANGE
V$PROXY_COPY_DETAILS
V$PROXY_COPY_SUMMARY
V$PROXY_DATAFILE
V$RMAN_BACKUP_JOB_DETAILS
V$RMAN_BACKUP_SUBJOB_DETAILS
V$RMAN_CONFIGURATION
V$SESSION
V$TABLESPACE
V$THREAD
V$UNUSABLE_BACKUPFILE_DETAILS
3) Log Files
The contents of the log files are viewed using LogMiner - read Chapter 11 of the Oracle Utilities manual

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